Exchange-biased topological transverse thermoelectric effects in a Kagome ferrimagnet
arXiv:2202.04484 · doi:10.1038/s41467-022-28733-7
Abstract
Kagome metal TbMn6Sn6 was recently discovered to be a ferrimagnetic topological Dirac material by scanning tunneling microscopy/spectroscopy measurements. Here, we report the observation of large anomalous Nernst effect and anomalous thermal Hall effect in this compound. The anomalous transverse transport is consistent with the Berry curvature contribution from the massive Dirac gaps in the 3D momentum space as demonstrated by our first-principles calculations. Furthermore, the transverse thermoelectric transport exhibits asymmetry with respect to the applied magnetic field, i.e., an exchange-bias behavior. Together, these features place TbMn6Sn6 as a promising system for the outstanding thermoelectric performance based on anomalous Nernst effect.
Accepted for publication in Nature Communications
References in corpus (7)
- Quantized Anomalous Hall Effect in Magnetic Topological Insulators
- Antiferromagnetic topological insulators
- Berry phase effect in anomalous thermoelectric transport
- Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
- Discovery of a quantum limit Chern magnet TbMn6Sn6
- Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn
- Quantum oscillations, Magnetic breakdown and thermal Hall effect in CoSnS